78 lines
1.8 KiB
YAML
78 lines
1.8 KiB
YAML
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/bus/simple-pm-bus.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Simple Power-Managed Bus
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maintainers:
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- Geert Uytterhoeven <geert+renesas@glider.be>
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description: |
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A Simple Power-Managed Bus is a transparent bus that doesn't need a real
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driver, as it's typically initialized by the boot loader.
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However, its bus controller is part of a PM domain, or under the control
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of a functional clock. Hence, the bus controller's PM domain and/or
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clock must be enabled for child devices connected to the bus (either
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on-SoC or externally) to function.
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While "simple-pm-bus" follows the "simple-bus" set of properties, as
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specified in the Devicetree Specification, it is not an extension of
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"simple-bus".
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properties:
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$nodename:
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pattern: "^bus(@[0-9a-f]+)?$"
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compatible:
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contains:
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const: simple-pm-bus
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description:
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Shall contain "simple-pm-bus" in addition to a optional bus-specific
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compatible strings defined in individual pm-bus bindings.
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'#address-cells':
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enum: [ 1, 2 ]
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'#size-cells':
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enum: [ 1, 2 ]
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ranges: true
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clocks: true
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# Functional clocks
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# Required if power-domains is absent, optional otherwise
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power-domains:
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# Required if clocks is absent, optional otherwise
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minItems: 1
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required:
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- compatible
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- '#address-cells'
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- '#size-cells'
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- ranges
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anyOf:
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- required:
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- clocks
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- required:
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- power-domains
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additionalProperties: true
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examples:
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- |
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#include <dt-bindings/clock/qcom,gcc-msm8996.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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bus {
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power-domains = <&gcc AGGRE0_NOC_GDSC>;
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compatible = "simple-pm-bus";
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#address-cells = <1>;
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#size-cells = <1>;
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ranges;
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};
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